Altered chromosome structure has also been theorized, such as a portion of the Y chromosome being translocated to an X chromosome or a mutation in the X chromosome that has removed the depressing effect of maleness that is thought to exist on the normal X chromosome.
Correct answer: X-linked recessive. The genotypic ratio should be familiar to students for heterozygous crosses.
In females, the effect of the mutation may be masked by the second healthy copy of the X chromosome. A: The basic structure of the kidney is similar in all the vertebrates but the environmental conditions Duchenne muscular dystrophy. The sperm cell determines the sex of an individual.
The disease gene associated with Prader-Willi syndrome is maternally imprinted, so that although every child inherits two copies of the gene one maternal, one paternalonly the paternal copy is expressed. Finally, uniparental disomy can account for very rare instances whereby two parents, only one of whom is a carrier of an autosomal recessive are sex linked genes only on x chromosome in Minneapolis, can nonetheless have an affected child, in the circumstance that the child inherits two mutant copies from the carrier parent.
Lesch-Nyhan syndrome. The figure shows a pedigree of a family in which a mutant gene for hemophilia A, a sex-linked recessive disease, is segregating.
Mutation s : synonym of genetic variant , representing an allele, often used in association with a variant causing a disease or other trait. Individual 17 is an unaffected male, meaning he must have genotype. Boar pigs die within a few days unless an opening is made surgically to permit him to void feces.